Actions that need root privilege:

epkg-installer.sh in global mode:

• run by root, or sudo
• create global
  • store
  • self env
• so dont need epkg_helper prefix

epkg update self env in global mode:

• run by root, or sudo
• update global
  • self env
• so dont need epkg_helper prefix

epkg install

• run by normal user
• add packages to global
  • store
• so need epkg_helper prefix, or in future, epkg-store suid cmd

epkg self install

• run by normal user
• only setup files in $HOME
• so dont need epkg_helper prefix

main scripts/programs in future

• epkg-installer.sh
• epkg-rc.sh, shell internal functions for export PATH/EPKG_ENV_NAME
• epkg rust
• epkg-store rust, may suid